@Michael Collins - short answer: yes. CC0 means (in poor words) you can do more or less what you want with this, including selling it, relicensing and using it for commercial projects. Though I personally find it useless to buy something you can simply download for free... At any rate, again, you can sell this.

Thank you very much for this work. I really liked it, so I took the naked character as a model to design my own "neo" character for my free Android game. I also used the medals you created, so I gave you credit on the info screen inside my game. It is already released, so if you want to have a look, I pass you the link here: https://play.google.com/store/apps/details?id=phij.games.NeoRunner